Im pretty much gonna agree with everyone else. The short ram is not going to give you an improved performance because of the air density inside of the engine. The full cold air intake is the only way to go. I hear great things about the CPE kit, but for me, I am saving up for the Mazdaspeed, since it has a warranty and from everything I hear, it sounds incredible. Everyone with the CPE swears its better, but how would they know. Its not like the have both of them installed and can compare. Its all personal preference though, and I can sleep better at night knowing the Mazdaspeed has a warranty instead of nullifies my warranty like the other CAI's do.